METHOD AND DEVICE FOR MEASURING POWER AND STEEPNESS OF INCREASE IN SECTIONS OF NONSTATIONARITY OF ACOUSTIC SIGNALS Russian patent published in 2020 - IPC G01N29/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to communication engineering, in particular to digital methods and devices for measuring power and steepness of acoustic signals. Technical result is achieved by using Hilbert amplitude envelope selected from acoustic signal. Low-frequency components of acoustic objects (e.g. sounds, words) are selected from Hilbert amplitude envelope by filtration. These acoustic objects contain the most important and informative areas of nonstationarity in the form of rising front fronts of these objects or "attacks". After determining and extracting data of nonstationarity areas with increasing steepness, containing N_x code combinations in each section, instantaneous power of each of these sections is measured, as well as measurement of average power of nonstationarity sections on a long time interval consisting of K of such sections. Besides, on each nonstationarity part with increasing steepness the duration of this section is determined Δt, and also determining difference of instantaneous amplitudes values ΔA between the end point of the non-stationarity part and its initial point. Further, by dividing ΔA on Δt, measurement of steepness of growth S of each nonstationarity part, as well as measurement of average steepness of rise of sections of nonstationarity, on a long time interval consisting of K of such sections. As a result of such measurements, it is possible to estimate the quality of acoustic signals with high accuracy, since it is nonstationarity regions that contain the greatest amount of information and their distortions during transmission and processing that significantly reduce the quality of these acoustic signals. These measurements will make it possible to carry out measures to reduce distortions of nonstationarity areas in acoustic signals and thereby improve their quality.

EFFECT: broader functional capabilities for measuring instantaneous and average power and steepness of growth of sections of nonstationarity of acoustic signals and high accuracy of estimating the quality of acoustic signals.

2 cl, 11 dwg